This standard specifies the characteristics of bihexagonal self-locking nuts, with counterbore, in heat resisting
steel, passivated.
Classification: 1 100 MPa / 650 °C
BS EN 3843:2010 history
2010BS EN 3843:2010 Aerospace series. Nuts, bihexagonal, self-locking, with counterbore, in heat resisting steel, passivated. Classification: 1100 MPa (at ambient temperature)/650°C